title: Electroweak Sudakov corrections to new physics searches at the LHC.
abstract: We compute the one-loop electroweak Sudakov corrections to the production process Z(νν)+n jets, with n=1, 2, 3, in pp collisions at the LHC. It represents the main irreducible background to new physics searches at the energy frontier. The results are obtained at the leading and next-to-leading logarithmic accuracy by implementing the general algorithm of Denner and Pozzorini in the event generator for multiparton processes alpgen. For the standard selection cuts used by the ATLAS and CMS Collaborations, we show that the Sudakov corrections to the relevant observables can grow up to -40% at sqrt[s ]= 14 TeV. We also include the contribution due to undetected real radiation of massive gauge bosons, to show to what extent the partial cancellation with the large negative virtual corrections takes place in realistic event selections.
authors.affiliation: Dipartimento di Fisica, Università di Pavia, and INFN, Sezione di Pavia, Via A. Bassi 6, 27100 Pavia, Italy.
authors.forename: Mauro
authors.initials: M
authors.lastname: Chiesa
authors.forename: Guido
authors.initials: G
authors.lastname: Montagna
authors.forename: Luca
authors.initials: L
authors.lastname: Barzè
authors.forename: Mauro
authors.initials: M
authors.lastname: Moretti
authors.forename: Oreste
authors.initials: O
authors.lastname: Nicrosini
authors.forename: Fulvio
authors.initials: F
authors.lastname: Piccinini
authors.forename: Francesco
authors.initials: F
authors.lastname: Tramontano